IT/OT Technical Architect Location: London, UK Employment Type: Full-time Work Model: Hybrid About the Role The role will lead OT cybersecurity, network modernization, and remediation initiatives across multiple manufacturing sites globally. The candidate will be responsible for architecture governance, cybersecurity assessments, remediation planning, stakeholder management, and successful delivery of OT transformation programs.
Key Responsibilities Lead OT cybersecurity and network transformation projects across manufacturing and industrial environments. Develop and govern OT High-Level and Low-Level Designs (HLD/LLD) aligned to ISA-95, Purdue Model, and IEC 62443 standards. Conduct OT cybersecurity risk assessments, threat modelling, gap assessments, and remediation planning. Drive network segmentation and micro-segmentation initiatives, including firewall policy design and governance.
Lead vulnerability management, system hardening, patch governance, and OT security compliance activities. Collaborate with site engineering teams, OEMs, infrastructure vendors, application vendors, and cybersecurity partners. Present technical solutions, risks, remediation plans, and architecture recommendations to senior stakeholders and governance boards. Support OT service management, incident response readiness, asset visibility, and continuous improvement initiatives.
Required Qualifications Strong experience in OT Network Engineering, OT Cybersecurity, or Industrial Systems Architecture. Strong knowledge of IEC 62443, ISA-95, Purdue Model, NIST 800-82, and OT cybersecurity best practices. Hands-on experience in OT network architecture, zoning and conduits, micro-segmentation, firewall technologies, and secure IT/OT integration. Experience with OT cybersecurity tools such as Armis, Nozomi, Cisco Cyber Vision, Palo Alto, Fortinet, SIEM platforms, or similar solutions.
Strong understanding of industrial control systems including Rockwell, Siemens, Honeywell, ABB, and associated industrial protocols (OPC, Modbus, EtherNet/IP, etc.). Experience in vulnerability management, cybersecurity assessments, OT system hardening, Active Directory security, backup and disaster recovery solutions. Proven capability in leading global, cross-functional teams and managing client, vendor, and stakeholder engagements.
Excellent communication, consulting, and leadership skills with experience driving large-scale remediation and transformation programs. Preferred Qualifications ISA/IEC 62443 (Fundamentals, Risk Assessment, Design, or Expert) CCNP / CCIE CISSP, GICSP, GIAC, or equivalent cybersecurity certifications Nozomi, Palo Alto, Fortinet, or other OT security certifications Preferred Industry Experience FMCG / Manufacturing OT Cybersecurity Programs Industrial Automation & Controls Critical Infrastructure CI/CD: GitHub Actions, Jenkins
Job description provided by Cognizant Technology Solutions.
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